Magneto-circuit closer



M almas. y

` E. FULLER. IAGIIETU CIRCUIT GLDSER.

(Applition hd Nav. 10, 189B.)

(lo Ilulel.)v

Patented lan.` I7, |899.

UNITED STATES PATENT OEEiCE.

.IOIIN E. FULLER, OF NEW YORK, N. Y., ASSIGNOR TO CALEB GOLES DUSENBURY, OF LAKE MAIIOPAC, NEW YORK.

MAGNETO-CIRCUIT CLOSER.

.SPECIFICATION forming part of Letters Patent No. 617,858, dated January 17, 1899. Application filed November l0, 1898. Serial No. 696,001. (No model.)

strument, so that thev pulsations from the magneto-generator do not pass through the transmitter or receiver, and in lifting down the receiver` the circuit is changed so as not to pass through the magneto-generator.

In the present invention a switch is actuated automatically bythe current set up in` the generator so as to include in the external circuit the circuit passing through the coils of the armature in order that the external circuit and the distant call may be actuated by the rotation of the armature, and when the rotation ceases the demagnetization of the armature or the field-magnet breaks the circuit through the armature-coil, thereby throwing out the resistance of such armature-coil and establishing the circuit containing other transforming devices, and while the present invention is especially adapted to telephonie instruments it may be used wherever a magneto-call isavailable and in which it is desirable to throw out of circuit the coil of the armature.

In the drawings, Figure lis a plan `View, partially in section, illustrating the present improvement. Fig. -2 is an elevation of the switch mechanism with the armature and connecting parts in section near the line 2 2, and Fig. 3 is a diagram of the circuit connections. The field-magnet is advantageously made ot' bars A, bent into a U shape and several bars grouped together and bound by the screw-clamps 3, and the pole-pieces l are connected with the field-magnets and arc concave on their opposing faces to receive between them the shaft C, armature-base D, and coil E, and the shaft C is advantageously Abattery at supported by the end pieces or framesF, and

the pinion. G is upon one projecting end of the shaft C, and the gear-Wheel II 'is upon a shaft I and rotated by a crank K or other suitable motive power.

By the rotation of the armature a current is to be set up through the helix of the armature, and this current is available in anv external circuit for any desired work or transformation, and the switch L is attracted by the magnetism of the armature or pole-pieces to close the circuit or to break the same as the magnetism may be setup or augmented.

I have represented this switch L as attached at one end 5, and the free end is near one end of the armature-base, and this switchis either of ,magnetic material or provided with a plate of magnetic material at the end, so that the augmentation of the magnetism in the armature-base will attract the moving A end of the switch and effect the opening or closing of the circuit.

In Fig. 3 Ihave shown in the circuit a transmitting instrument at M, a receiver-at N, a O, and a bell at I?, and it will be apparent that when the armature is rotated and the magnetism of the-armature-base or core is augmented the circuit will be closed through -the armature-coil, and hence theeurrent will be directed through the external circuit for Iactuating the call-bell at the distant station, and as soon as Athe rotation of the armature ceases and the core 'orarmature-basc demagrietizes, or partially so, the spring 'of the switch L closes the external circuit through the back-stop f5, thereby cutting out the armature-coil and lessening the resistance in the telephonie circuit, and this 'operation is the same, regardlessof the instruments that are included in the working or external circuit, and where the iieldmagnets are in series with the armature-coil the magnetism of the cores 4 of the field magnet or magnets will be augmented and the switch I. may receive its metion from the augmentation of the magnetism in either core. y

I have represented the switch as supported by two springarms 7, lthat are fastened, atene end rigidly, and the other 'ends carry the switch L, that is of magnetic material', and on e circuit-\\'irc comes tothe spring portion et the switch, and the spring closes the switch against the back-stop C when the magnetism is diminished, and when the magnetism is augmented the movement ofthe switch by the attraction closes the same against the stop (l, which is in the circuit containing the armature-coil. I, however, do not limit myself to the arrangement of the circuits herein represented, because the automatic switch,

brought into action one way or the other antomatically by the change of magnetism in the adjacent parts, can be availed of in any arrangement of external circuits, the spring moving the switch in the opposite direction to the magnetism.

I claim as my invention-4 l. The combination with the field-magnet, the armature and its coil, of a switch having magnetic material that is acted upon by the change of magnetic strength, and circuit-closing stops at opposite sides of the switch with which the switch is brought into contact in one direction by the action of a spring and in the other direction by the action of the magnetism, substantially as set forth.

2. In a dynamo, the combination with the revolving armature having a core and coil, of

a switch carried by such armature and magnetic material upon the switch, by which the switch is moved by the increase of magnetism, circuit connections from the switch whereby the armature-coil is brought into the circuit when the magnetism of the armature is augmented and in which the automatic movement of the switch cuts out the armature-coil when the rotation of the armature ceases, substantially as set fo: th.

The combination in a telephonie circuit containing a transmitting and receiving instrument and Aa call-bell, of a d ynamo-generator having an armature with a core and coil, a switch uponthe armature, a spring for carrying the same, circuit connections that closc the external circuit when the dynamo is at rest, and circuit connections that bring in the armature-coil automatically by the action of the switch when the armature is revolving, substantially as set forth.

Signed by me this 1st day of November,

JOHN E. FULLER. Witnesses:

GEO. T. PINcKNEY, S. T. IIAVILAJND. 

